The radius of the Earth is about 6,400 km. Find the distance to the horizon that a person can see on a clear day from 1 km above the Earth. Round your answer to the nearest kilometer.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Candy lives in the center of town. her friend darlene lives 28 miles to the east and her friend dana lives 21 miles north. approximately how far do dana and darline live apart ?

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27